General Dynamics C4 Systems URC-200 (V2)
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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 21 on the URC-200 (V2). For each preset
channel, adjust the URC-200 (V2) for the following.
FM, CT, SCN OFF, BCN OFF
To configure presets, refer to Paragraph 4.4.6.
6. Receiver FM CT Sensitivity Measurement:
a. Depress the RF key on the R2600 panel. Move the cursor to the Preset position and set it
for Preset 01. Adjust the URC-200 (V2) for channel 1.
b. Move the cursor to the Output Lvl (RF Output Level) position. Position the highlight to
the one-tenth position by depressing the RIGHT ARROW CURSOR POSITION key three
times. Rotate the TUNING control counter-clockwise on the R2600 panel until the RF
Output Level reads the limit for FM CT Sensitivity as stated in Table 1.
c. Verify the 8kHz waveform pattern on the screen of the R2600 has an amplitude of 4 VPP
to 24 VPP. Verify the square wave pattern is the same as it was with a -50dBm signal
except for the slight jumping around of the 8kHz pattern. It may be helpful to observe
the 8kHz pattern as the RF input level is decreased. The jumping around of the pattern
will turn into a random breakup of the pattern.
d. On both the URC-200 (V2) and the R2600 repeat steps A through C for preselect
channels 2 through 9 and channel 0 on the URC-200 (V2) with the R2600 set on preset
channel 10.
5.3.2.3 Receive AM PT Sensitivity and Distortion
1. Set up the test equipment as shown in Figure 16. Connect the
VERT/SINAD/DIST/DVM/COUNTER IN connector on the R2600 to Pin E (PT OUT) of
the Remote connector. Pin A or D of the remote connector is return ground.
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. Use the CURSOR POSITION keys to the Monitor Frequency position and enter 115.000
from the R2600 keypad.
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