User's Manual

4-24
o. Move the cursor to the Pos (Position) position and depress the "move up" or "move
down" softkeys as appropriate to center the displayed scope screen trace. Note: The
TUNING knob on the R2600 panel may be used in lieu of the "move up" or "move
down" softkeys.
p. Adjust both the SQUELCH and VOLUME controls on the front panel to their maximum
CCW positions.
5. Setup the URC-200 (V2) as follows:
a. Turn the transceiver on and note the input current. It should be approximately 240mA. If
the current exceeds 330mA, a problem exists in the transceiver. Turn off the power and
troubleshoot the transceiver.
b. Set the frequency presets as listed in Table 4-3 on the URC-200 (V2). For each preset
channel, 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, PT, SCN OFF, BCN OFF
6. Transmitter FM PT Deviation and Distortion Measurements:
a. Set the presets on both the URC-200 (V2) and the R2600 to channel 01. Verify the
URC-200 (V2) is in the LO POWER mode.
b. Key the transceiver into the R2600 test set and read the FM deviation on the R2600
screen. Verify compliance with Table 1-1 in Section 1 of this manual. Note: In keying
the transceiver the PTT line, pin F, will be grounded.
c. Depress the DISP key on the R2600 front panel and move the cursor to the Meter
position and press the "EXT DIST" softkey. Note: The "more" softkey may have to be
depressed for the "EXT DIST" softkey to be displayed.
d. Read the FM distortion on the R2600 screen and verify compliance with Table 1-1 in
Section 1 of this manual.
e. Depress the DISP key on the R2600 front panel and move the cursor to the Meter
position and press the "RF DISPLAY" softkey. Note: The "more" softkey may have to
be depressed for the "RF DISPLAY" softkey to be displayed.
f. On both the URC-200 (V2) and the R2600 repeat steps A through E for preselect
channels 2 through 9 and channel 0 on the URC-200 (V2) with the R2600 set on
preset channel 10.
4-2.3.3 FM CT Deviation and Distortion
1.
Set up the test equipment as shown in Figure 4-2. Connect the
VERT/SINAD/DIST/DVM/COUNTER IN connector to the DEMOD connector on the
R2600. On the R2600 connect the MOD OUT connector to pin B of the X-MODE
connector on the URC-200 (V2). Do not connect the PTT (Push-to-Talk) line (pin F) to
ground. Note: When the PTT line is grounded the URC-200 (V2)'s transmitter will key itself
ON.
2. Set the input power supply to 28  .1 Vdc.
3. Preset the R2600 by performing the following steps.
a. Press the MEM (Memory) key on the R2600 panel for the preset-screen.
b. Use the CURSOR POSITION keys to highlight preset 01.
c. Press the "view preset" softkey. Note: The softkeys are the eight keys under the CRT
screen on the R2600.
d. Using the CURSOR POSITION keys move to the Monitor Frequency position and
enter 115.000 from the R2600 keypad.
e. Move the cursor to Modulation Type and press the "FM" softkey.