MHPTV TX User Manual BPF standing on the floor next to the TX cabinet: Low Pass Filter Band Pass Filter Please note: The 1.1kw~5.5kw MHPTV comes standard with a 1 5/8 EIA Flanged output connector, and the 6.6kw~8.8kw MHPTV comes standard with a 3 1/8 EIA Flanged output connector. If your Antenna feed is other than the standard connector (as shown on left), you will need to provide whatever adapter hardware is necessary to facilitate this connection to your Antenna feed). MHPTV-USR-DOC-V3.
MHPTV TX User Manual Before and After BPF Directional Coupler installation Please be sure to install the Before and After BPF Directional Couplers in the correct positions and orientation. Incorrect operation of the TX system may result if these directional couplers are not installed in the proper locations with the proper orientation as labeled. MHPTV-USR-DOC-V3.
MHPTV TX User Manual 1.6 TX Ventilation MHPTV PA cooling is from front to rear. In a standard installation, warm air is vented out perforations in the cabinet rear door and into the room. A proper airconditioned, dust-free environment is required to operate the TX equipment. There is an option to exhaust heat out the top of the cabinet. The top-down cabinet drawings below show the provision for the top panel ventilation hole (11 inches). Please specify cabinet ventilation when ordering.
MHPTV TX User Manual 3 & 4 PA 5 PA 6 & 8 PA MHPTV-USR-DOC-V3.
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MHPTV TX User Manual 2. Theory of Operation The MHPTV transmitter is conceptually simple to understand and easy to operate. The Transmitter operates on either 240VAC single-phase (3-wire) or 208VAC three-phase (4-wire) AC Mains service. An AC Mains Distribution compartment is located on the back-rear floor of the TX. This compartment is shielded for personnel safety and provides the distribution of appropriate AC power to the various modules inside the TX cabinet.
MHPTV TX User Manual after BPF feedback signals are used by the Exciter to provide automatic Linear and Non-Linear pre-correction of the forward path signal. Additional feedback signals are provided to the Control module, which monitors these samples to implement protective protocols including forward power reduction and shutting down the TX in the event of high reflected power or other unsafe operating conditions.
MHPTV TX User Manual 2.1 Control Unit 2.1.1 Control Unit（CTL-S） For 1, 2 and 3 PA configurations, the TX Control Unit CTL-S consists of a preamp and a powerful control system. It receives the RF input(s) from the exciter(s), performs the pre-amplification, and sends RF output to a PA or an external N-way splitter to feed up to 3 PAs. The CTL-S communicates over an RS-485 serial bus to the PAs and Exciter(s) installed in the system and monitors system Forward, Reflected, and Reject load power.
MHPTV TX User Manual Rear Panel The rear panel of the Control Unit is shown below: RF_OUT Connector: N Impedance: 50 Ω Note: Sends pre-amplified RF signal to the inputs of PA modules RF_IN_A/RF_IN_B Connector: N Impedance: 50 Ω Note: To receive the RF_OUT signal from Exciter_A / Exciter_B REFL_IN (TX Reflected Power) Connector: BNC Impedance: 50 Ω Note: To receive feedback signal from Directional Coupler for Reflected Power detection and monitoring.
MHPTV TX User Manual 2.1.2 Control Unit（CTL-M） For 4 to 8 PA configurations, the TX Control Unit CTL-M consists of a pre-amp, an N-way splitter with “Optitune” (phase/gain adjustment) circuit, and a powerful control system. It receives the RF input(s) from the exciter(s), performs the preamplification, and sends RF output to an N-way splitter with phase/gain adjustment circuit, finally to feed 4, 5, 6 or 8 PAs.
MHPTV TX User Manual Rear Panel The rear panel of Control Unit is shown below: RF_OUT-1/…/RF_OUT-8 Connector: SMA Impedance: 50 Ω Note: Sends pre-amplified RF signal to the inputs of PA modules RF_IN_A/RF_IN_B Connector: SMA Impedance: 50 Ω Note: To receive the RF_OUT signal from Exciter_A / Exciter_B ERS485-A/ERS485-B: To be connected to REMOTE of Exciter_A/Exciter_B for internal communication between exciters and Control Unit.
MHPTV TX User Manual 2.
MHPTV TX User Manual Rear Panel RF_IN_A: Feedback signal, sampled after the band-pass filter (-5 to -15dBm) RF_IN_B: Feedback signal, sampled before the band-pass filter (-5 to -15dBm) AGC_IN: Feedback DC voltage for AGC control (0-5VDC) RF_MON: Loop out of RF_OUT for monitoring (-25 dB below RF_OUT) RF_OUT: Main RF signal output of exciter, to be connected to RF_IN_A/RF_IN_B of Control Unit (nominal 0 dBm output) DRY LOOP: Dry loop for remote control REMOTE: To be connected to ERS485-A/ERS
MHPTV TX User Manual 2.3 ANY1022 (option) ANY1022’s Front Panel PWR: The green light ON indicates ANY1022 is powered ON. STATUS: The red light ON indicates ANY1022 has detected an internal hardware error. ALARM: The red light on indicates ANY1022 has at least one active alarm. ANY1022’s Rear Panel REMOTE: To be connected to the 10” touch screen (industrial PC)’s LAN1.
MHPTV TX User Manual WIFI: Reserved. POWER: Power switch on/off. COM2/3/4: Serial port COM1: Serial port LAN2: To access to Ethernet. LAN1: To be connected to ANY1022 REMOTE(RJ-45). USB: two USB ports VGA HDMI DC9-24V: 24VDC voltage input. The default IP Address of the ANY1022 is 192.168.254.254. In order to communicate with the device through a web browser, configure the industrial PC (with 10” touchscreen) to be on the same subnet as ANY1022.
MHPTV TX User Manual By pressing “Control Panel” switch to the Receiver Control Panel Log-in page and enter a password for Administrator level of access. The default password is “admin”; Once logged in, navigate to Control Panel->System->Network and adjust the Receiver Network interface settings. MHPTV-USR-DOC-V3.
MHPTV TX User Manual Below are a few screenshots of ANY1022 displayed on the 10” touchscreen. MHPTV-USR-DOC-V3.
MHPTV TX User Manual MHPTV-USR-DOC-V3.
MHPTV TX User Manual MHPTV-USR-DOC-V3.
MHPTV TX User Manual MHPTV-USR-DOC-V3.
MHPTV TX User Manual Note: Please refer to the ANY1022 User Manual for more details. MHPTV-USR-DOC-V3.
MHPTV TX User Manual 2.4 Power Amplifier – PA-8D-C-FA The MHPTV TX may be fitted with 1, 2, 3, 4, 5, 6, or 8 PA-8D-C-FA PA modules. Each module consists of a total of 8 BLF888E (Doherty) devices per PA drawer. Each PA is also fitted with two pluggable 50V power supplies. Front Panel The front panel of PA is shown as below. The LED indicators and ports are listed below. LAN: 10M/100M Ethernet port for web-based remote control (IP address: 192.168.1.
MHPTV TX User Manual LED_ALARM The red light will be on if there is any alarm The red light will be off if there is no alarm RESET: To reset the IP to default (192.168.1.200). Rear Panel The rear panel of PA is shown below with ports described as follows. RF_OUT Connector: 7/16 DIN Impedance: 50 Ω Note: To send out RF signal to the input of Power Combiner (attached to the cabinet). It must always be connected to a load.
MHPTV TX User Manual 3. Installation/Initial Turn-On Once the RF connections have been properly made into your antenna feed or suitable station load, and the Transmitter has been properly wired to the station electrical panel (as outlined in Chapter 1) you are now ready to turn on the system. Please locate and have handy for reference a copy of your MHPTV TX Factory Test Report, and Exciter User Manuals. Please follow the steps outlined below to safely turn on and bring your TX system up to power. 1.
MHPTV TX User Manual It takes a few seconds for the Controller to power up and to display the HOME screen (shown below). Please note that the values will be different as the TX initially turns ON at a reduced power level. TX On/Off (Green = ON, Red = OFF) The Controller HOME touchscreen display will indicate System Forward (FWD), Reflected (REFL), and Reject Load (REJT) output power in Watts in real-time. 2. Check Exciter settings.
MHPTV TX User Manual 3. You are now ready to bring the TX up to power. To accomplish this, slowly increase the drive level out of the Exciter by increasing the POWER setting in the Exciter RF submenu while watching the Sys FWD power increase accordingly on the Controller touchscreen. Begin to slowly raise the FWD System power by using the UP button on the Exciter, while monitoring the FWD system power meter on the Controller HOME screen as shown below.
MHPTV TX User Manual 5. Continue to slowly raise the FWD power until you reach the max power rating of the TX or your lower desired TPO. Check to be sure that the PA device currents do not exceed the full power operating currents as shown in your Factory Test Report. Also, be careful to make small increases in the value of Exciter POWER as you approach the desired TPO. Monitor device currents on all PA drawers – be sure to not exceed Factory Test data values 6.
MHPTV TX User Manual Linear and Non-Linear corrections were performed and optimized at the TX rated TPO in the factory and so the stored correction coefficients should produce good results if you are operating at or close to the TX max output power. If you are operating at a TPO less than the max rated TX power or wish to rerun corrections, please reference the “Running Corrections” section of your transmitter User Manual. 7.
MHPTV TX User Manual Set Target AGC Power to desired TPO Press AGC button to turn AGC ON (will illuminate Green) 8. Press the HOME button to return to the HOME screen to monitor FWD power With the AGC engaged, the FWD power metering may vary up to +/- 5%, so for a 1500W TPO, meter variations from 1425W to 1575W may be experienced. 9.
MHPTV TX User Manual 10. Your TX should now be up and running properly into your load or on-air antenna. Continue to monitor system parameters as you allow the transmitter to warm up to temperature and stabilize at full output power for another 30 minutes. 11. To turn the TX On/Off, please use the TX On/Off button located on the HOME screen of the Control module or via the TX built-in web interface.
MHPTV TX User Manual 13. You may network your Transmitter Control Module (rear LAN connector, default IP address 192.168.1.210) and your Exciter (REMOTE RJ-45 rear panel connection at 192.168.1.143), and your PA drawers (front LAN port 192.168.1.200 – note – you will need to change some of the PA IP address (via the PA built-in web interface) to avoid network conflicts if putting all PAs on your network for remote monitor/control.
MHPTV TX User Manual 4. Operational Basics 4.1 TX ON/OFF Local Control: To turn the TX On/Off, please use the TX On/Off button located on the HOME screen of the Control module. The Button will light Green when the TX is ON and RED when the TX is off. When turning the TX ON, please monitor the FWD power wattage on the HOME screen as FWD power ramps up to the AGC target level (which takes roughly 45-60 seconds).
MHPTV TX User Manual 4.2 RAISE/LOWER POWER Local Control: To raise or lower the TX system forward power, please adjust the target AGC power setting on the Controller AGC screen. Monitor the change in power via the Home screen FWD Power meter (which may take up to 60 seconds). Please note, as an alternative, you could disable the Controller AGC (Turn AGC Off) and raise/lower the Exciter output drive.
MHPTV TX User Manual 4.3 RUNNING CORRECTIONS Local Control: This section guides you through the process of running Linear and Nonlinear Precorrection (You may also reference the Exciter User Manual for additional details and instructions on running corrections). If you are operating at reduced power you may wish to rerun corrections to achieve better RF performance.
MHPTV TX User Manual 3. Before running corrections, it is important to verify proper feedback signal levels. There are two feedback signal samples used to compute corrections. “RF IN A” (After BPF) is used to calculate Linear correction coefficients while “RF IN B” (Before BPF) is used to compute the Non-Linear correction coefficients. 4. Navigate to the Exciter “DPD” submenu in the Advanced User menu (simultaneously press Left and Right buttons, then simultaneously press Up and Down buttons).
MHPTV TX User Manual 7. Check the SNR and Shoulder (LIMD and UIMD) RF performance on the front panel screen of the exciter or by pressing the Exciter Icon on the Controller HOME screen. (Change the value of CFR or rerun correction if necessary, to obtain optimal performance). 8. With your TX operating at your desired output power and with good RF performance, the next step is to set up and re-engage the TX AGC.
MHPTV TX User Manual 10. Press the HOME button to return to the HOME screen to monitor FWD power. With the AGC engaged, the FWD power metering may vary up to +/- 5%, so for a 1000W TPO, meter variations from 950W to 1050W may be experienced. 11. On the Exciter, navigate to the CAL setting under the AD3 Advanced submenu and select CAL then press OK to calibrate the FWD PWR meter on the Exciter front panel to ~ 100%.
MHPTV TX User Manual Please note that the Exciter FWD PWR meter reading is based on the RF_IN_A BNC feedback sample on the rear panel of the Exciter and is only available when this sample is connected and in the proper signal level range (35% < FSSI A < 75%). MHPTV-USR-DOC-V3.
MHPTV TX User Manual 4.5 CALIBRATE TX SYSTEM POWER METERS Local Control: There are three TX system power meters located on the Controller HOME screen, Forward (FWD), Reflected (REFL), and Reject Load (REJT). These power meters were calibrated at the factory to provide accurate power readings when testing the TX at its full rated output power. These meters may be recalibrated if desired via the Controller calibration screens as outlined below.
MHPTV TX User Manual Normal operation for the MHPTV TX is to run with the Transmitter AGC enabled to compensate for slight variations in output power due to changes in temperature, AC mains, etc. It is not recommended to perform power meter calibration with AGC enabled. 1. Please navigate to the Controller AGC screen (by pressing the CONFIG button and then AGC button) and disable AGC by pressing the Green button (as shown below), so that the button then becomes transparent (blue).
MHPTV TX User Manual 3. Disconnect the FWD IN sample from the rear panel of the Controller and connect this to your power meter. This sample comes from the TX output directional coupler and has a coupling value of 50dB (offset for your power meter). Measure and record the real Forward system power. Power Meter 1000.0 W FWD REF X Coupler IN RJCT Reject Load 4. Disconnect the FWD sample from your power meter and reconnect it to the FWD IN port on the rear panel of the Controller. 5.
MHPTV TX User Manual 6. Navigate to the TX meter Calibration screen on the Controller by pressing the CONFIG button and then selecting AmpCF (Amplifier Configuration) The AmpCF screen is used to configure advanced settings of the TX System and PAs and is locked with a password. When pressing the “AmpCf” button in the Config Menu, a pop-up window requiring a password will appear. Please enter the “AmpCf” password “27654” and then press “OK”.
MHPTV TX User Manual The ComCF screen is used to configure the TX maximum operating thresholds to engage safety and protective power reduction and shutdown mechanisms. Press the NextPage button to reach the FWD, REFL, and REJT power calibration screen below. 7. Press the word FwdPara to slightly adjust this value up or down (in small increments 0.1, 0.2, etc.) until the FWD power meter reading on the Controller HOME screen (also available via the Controller Web interface: RJ45 LAN default IPaddress 192.
MHPTV TX User Manual Calibration for FWD power meter (FwdPara) 8. Please note: the above FWD power meter calibration (and below Reflected and Reject meter readings) may alternatively be adjusted and calibrated via the Controller Web interface (192.168.1.210) Common-Set Tab instead of the Controller front panel touchscreen – as shown below. Calibration for FWD power meter (FWD-Para) 9.
MHPTV TX User Manual Calibration for REFL power meter 10. Repeat steps 3 through 7 above, this time removing, measuring, and returning the RJCT IN sample to calibrate the Reject Load system power meter by adjusting the value of Rejt1 below. Calibration for RJCT power meter 11. With your TX operating at your desired output power and with accurately calibrated system power metering, the next step is to set up and re-engage the TX AGC.
MHPTV TX User Manual TPO level and then press the unlit AGC button to engage the TX AGC and turn this button Green. Set Target AGC Power to desired TPO Press AGC button to turn AGC ON (will illuminate Green) 13. Press the HOME button to return to the HOME screen to monitor FWD power With the AGC engaged, the FWD power metering may vary up to +/- 5%, so for a 1000W TX, meter variations from 950W to 1050W may be experienced. 4.
MHPTV TX User Manual interface. Important: Never run Optitune at full power, otherwise it may cause damage to the transmitter and void the warranty. It is required only running Optitune with the guidance from the manufacturer. Local Control: 1. Make sure AGC is turned OFF, then lower the overall transmitter forward power level to 1kw. 2.
MHPTV TX User Manual 3. With the password properly entered, the AmpCf configuration screen will appear, as shown below. Press the System button. The System screen is used to run Optitune (AUTO_G_P) and One-Button Adjusting PSU output voltage (see section 4.7). MHPTV-USR-DOC-V3.
