Pulsar TCF-10B, System Manual, Page: 83 / 249

JU2 When set, provides 100 ohms (10.0
Vrms)
6. If the above (Vrms) values are not achieved,
recheck the tuning of the coupling system, as
it is not presenting the Transmitter with the
proper termination.
6.7 Check TCF–10B Internal and
External CLI Settings
1. At the Power Supply Module, turn the power
“ON”.
2. Place the CLI/Discriminator Module on an
Extender board and open switches 24A and
24C (on the Extender board).
3. Using a Signal Generator, apply a 3.16 Vp-p
(1.106 Vrms) 20 kHz signal between 24A and
32A. Adjust Internal CLI full-scale poten-
tiometer R1 for a reading of (+10) on the
Internal CLI Meter. Adjust the External CLI
full-scale potentiometer (R110) for a similar
(+10) reading on the External CLI meter.
The Noise Light (D1) may come “ON”. This
is not unusual.
6.8 Check TCF–10B Receiver
Margin
This test should be performed with a normal
received signal from the far end Transmitter.
At the Receiver Module, adjust the LEVEL
ADJUST potentiometer (R3) until there is an indi-
cation of 0 dB at the CLI and Discriminator
Module (15 dB margin).
If the system is not equipped with a CLI meter,
use a Selective Level meter. Adjust the Receive
Level potentiometer (R3) until there is a reading,
of 158 µVrms (-63 dBm at 50 ohm reference) at
the Receiver Module test jacks: TJ2 (RCV)/TJ3
(COM).
6.9 Prepare the TCF–10B for
Operation
Be sure that power is “ON” at the Power Supply
Module.
1. Restore the Keying Module to the desired
settings. (See the TCF–10B Adjustment Data
Sheet near the end of this chapter. This data
sheet is to be completed by your settings
department.)
2. Replace the cover on the TCF–10B control
panel.
a) Secure the latch by pushing inward and
sideways until the cover is secure.
b) You may lock the latches into place using
meter seals.
This completes the “Routine Adjustment”
procedure. The TCF–10B is ready to be put into
operation.
NOTE
When placing the TCF–10B into service,
refer to the manual for the relay system you
are using with the TCF–10B System.
April 1997 Page 6–7
Chapter 6. Routine Adjustment Procedures
6