1
6
4
The transmitter is now in operation. Check its coverage area for clean, sharp television reception.
If the reception or picture quality is unsatisfactory, examine the amount of power delivered to the
transmitting antenna and, if necessary, examine the antenna orientation, antenna VSWR, and
transmission line VSWR to insure maximum radiation in the proper direction.
1.4b
TU100FA Translator:
Assuming the installation instructions of Section 1.3 have been completed and the translator is
receiving RF signals, proceed with the following steps to place the translator in operation. It is
assumed that the TU20F is being used to drive the TUA100FA Power Amplifier.
1.
Place the Receiver’s power switch to ON and its OPERATE/ALIGN switch to OPERATE.
Verify the following responses.
a.
The CARRIER PRESENT indicator should be illuminated green, indicating that a
VHF/UHF signal of correct frequency and sufficient amplitude is being received.
2.
On the TTU20F Driver (A2), turn the POWER ADJUST control fully counterclockwise, place
the OPERATE/STANDBY switch to STANDBY, and place the OPERATE/ALIGN switch to
OPERATE. Place the meter switch to FWD and the POWER circuit breaker to ON. Then
verify the following responses of the transmitter.
a.
The fans of the driver should be operating and exhausting air out the rear of the drawer.
b.
The driver OPERATE, SYNTH LOCK and DRIVER AMP indicators should be
illuminated green.
c.
The TEMP EXCITER, ON, FINAL BIAS, and VSWR OVLD indicators should be
extinguished.
3.
Place the TUA100FA Power Amplifier (A3) power switch to ON and meter switch to FWD.
Verify the following responses of the amplifier drawer.
a.
The fans of the amplifier should be exhausting out the rear of the drawer.
b.
The FINAL ON and AMPL 1 indicators should be illuminated green and the TEMP
indicator should be extinguished.
4.
Place the driver OPERATE/STANDBY switch to OPERATE. Then verify the following
responses of the driver.
a.
The OPERATE, SYNTH LOCK, and DRIVER AMP indicators should remain
illuminated.
b.
The ON and FINAL BIAS indicators should be illuminated green while the VSWR OVLD
and TEMP indicators remain extinguished.
5.
Turn the POWER ADJUST control clockwise until a 100% indication appears on the
TUA100FA % POWER meter. The % POWER meter on the TTU20F may indicate less than
100% which is appropriate.
