User's Manual

4-33
a. On the URC-200 (V2) set the frequency presets to channel 8 and program it to
312.000 MHz. Adjust the URC-200 (V2) for the following. Note: Information on
presetting the URC-200 (V2) is given in Paragraph 2-3.2 located in Section 2 of this
manual.
FM, LO POWER, CT, SCN OFF, BCN OFF
6. Transmitter Beacon Measurements:
a. Set the presets on both the URC-200 (V2) and the R2600 to channel 08. Verify the
URC-200 (V2) is in the LO POWER mode.
b. On the transceiver, set BCN ON per Paragraph 2-3.3.2.
c. Read the transmitter output power on the R2600. Verify compliance of the output
power (LO POWER mode) with Table 1-1 in Section 1 of this manual. Turn up the
VOLUME control on the R2600; the variable frequency emergency beacon tone should
be audible and visible on the R2600 display.
4-3. POWER SUPPLY VOLTAGES
The internal power supply in the URC-200 (V2) is located on the Audio, Processor, Power
Supply (APPS) printed wiring board. The power supply has one input voltage (+24 Vdc)
and five
output voltages (+5 Vdc, -5 Vdc, +12 Vdc, -12 Vdc, and +70 Vdc).
4-3.1. INPUT VOLTAGE
The
input voltage can
be measured on pin G of the X-Mode connector which is located on
the front panel. Depending on what is being used to supply power to the transceiver (batteries,
external power supply, or etc., the normal input voltage can vary from approximately 22 Vdc to 30
Vdc. This voltage can also be displayed on the front panel of the transceiver using the R/T key as
described in Paragraph 4-3.2.
NOTE
If the transceiver is being operated from batteries and the voltage reading
is below 22 Vdc, install fresh batteries in the battery pack.
4-3.2. INTERNAL VOLTAGES
Six internal voltages can be displayed on the front panel. The following table
shows the
tolerance range
for each. If the input voltage is within the specified range and any of the internal
voltages are out of tolerance, the transceiver should be returned to General Dynamics for repair.
Display Internal Voltage Tolerance
PS1 +5 Vdc 4.4 to 5.6 Vdc
PS2 +12 Vdc 10.5 to 13.4 Vdc
PS3 -5 Vdc -4.4 to –5.6 Vdc
PS4 -12 Vdc -10.5 to –13.4 Vdc
PS6 +70 Vdc 61.6 to 78.4 Vdc
4-3.2.1 Voltage Measurements