Pulsar TC-10B, User Manual

Page: 81 / 190

Receiver Sensitivity
Check the Carrier Level Indicator readings per
Table 7-5.
7.3.4 Receiver Output Module Tests
Preliminary Steps
1. Connect a power supply source (48, 125, or
250Vdc) to the following Rear Panel
terminals (with reference to TB7-2):
• Receiver Output #1: TB1-1 (+)
• Receiver Output #2: TB1-4 (+)
2. Connect the Signal Generator (H/P 3325A) to
the chassis at the UHF RF Input jack (J1) on
the rear panel.
3. Place the Receiver Output Module on an
Extender Board (see Figure 4-1).
Receiver Output Test Procedure
1. Set the Signal Generator to 250 kHz, at a level
between 150 and 250mV rms (The DETECT
LED should be on.)
2. Measure the voltage level at TB1-2 with
TB7-2 as a reference. This voltage should be
the same as the power supply source (48, 125,
or 250Vdc). Also, measure the voltage level at
TB1-5 with TB7-2 as a reference. This should
be the same as the power supply source (48,
125, or 250Vdc).
3. Remove the input signal, ensuring that the
output level drops out.
4. Load down the output by connecting the
appropriate resistor as shown in table 7-6.
5. Insert a current meter (Fluke 75 or equivalent)
in the circuit by connecting the meter across
the open switches on the card extender for
pins C/A 16 for OUTPUT #1 and C/A 22 for
OUTPUT #2.
6. Current readings should be 16 to 30 mAdc for
a 2200 Ω resistor and 160 to 230 mAdc for a
25 Ω resistor.
7. Disconnect the Signal Generator from the jack
(J1) on the rear panel.
8. Re-install the Keying Module.
October 2003 Page 7–5
Chapter 7. Design Verification Tests
7
(mV) CLI LEDs on Module LEDs ON LEDs on Fixture
Detect/Margin Detect/Margin
11.24 _____dB (-20 +/- 2dB) OFF/OFF OFF/OFF
353 _____dB (+10 +/- 2db) ON/ON ON/ON
20 _____dB (-15 +/- 2dB) ON*/OFF ON*/OFF
35.3 _____dB (-10 +/- 2dB) ON/OFF ON/OFF
63.3 _____dB (-5 +/- 2dB) ON/OFF ON/OFF
112.2 _____dB (0 +/- 2dB) ON/ON ON/ON
200 _____dB (+5 +/- 2dB) ON/ON ON/ON
Table 7–5. Level Detector and CLI Test Procedure Specifications.
*Only lights at this level