10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 3-20
15 July 1997
Table 3-5 IPA Module Controls and Indicators
PANEL MARKING/
REF FIG NOMENCLATURE FUNCTION
DES NO. USED IN TEXT
A17
♦
C3
*
OUTPUT TUNE
Adjusted to series resonate the leakage inductance of
transformer T1's secondary winding at a frequency
which optimizes the amplified power gain.
A17
♥
C1
*
INPUT TUNE
Adjusted to TUNE
the input impedance of the dual
power MOSFET to 50 ohms at the carrier frequency..
A17A5S1-1 *
RF Output 1
Normally set to NORMAL. Allows for tuning of RF
amplifier 1 when set to TUNE.
A17A5S1-2 *
RF Output 2
Normally set to NORMAL
.
Allows for tuning of RF
amplifier 2 when set to TUNE.
A17DS1 *
PA VDC
When turned on, indicates pa volts are applied to the
IPA module.
NOTES
Partial reference designations are listed. Prefix with A18, A19, A20, A21, A22 or A23 for full reference
designations.
♦
Denotes there are two identical power amplifier output PWBs. Prefix with A1 and A3 as appropriate.
♥
Denotes there are two identical power amplifier input PWBs. Prefix with A2 and A4 as appropriate.
* Denotes refer to figures in the intermediate power amplifier module service instruction manual to locate
control/indicator.
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