General Dynamics C4 Systems URC-200 (V2)
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h. 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.
5.3.3.5 AM CT % Modulation and CT Distortion
1. Set up the test equipment as shown in Figure 17.
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
REMOTE 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" soft key.
NOTE
The soft keys 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 "AM" soft key.
f. Move the cursor to the Generate Frequency position and enter 115.000 from the R2600
keypad.
g. Move the cursor to Modulation Type and press the "AM" soft key.
h. Move the cursor to bandwidth and press the "WIDE ±100kHz" soft key.
i. Move the cursor to the Duplex Offset position and press the "DON'T CARE" soft key.
j. Move the cursor to Synth. Format Sel (Synthesizer Format Select) and select the "Tone
A" soft key.
k. Move the cursor to Freq (Frequency) and enter 01000.0 from the keypad.
l. Move the cursor to the DTMF Code position and press the "DON'T CARE" soft key.
NOTE
The “more” soft key may have to be depressed for the “DON’T CARE” soft
key to be displayed.
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