Vector-LP Radio Beacon Transmitter Technical Instruction Manual Page 3-13
Section 3 Operating Instructions Issue 1.1
Table 3-5: RF Synthesizer PWB Controls and Indicators
ITEM
(Ref
PANEL
MARKING
DESCRIPTION
E1, E2
REF (10 MHz) Bi-position selection jumpers used to configure the RF
synthesizer PWB to use either an internal or external 10 MHz
reference generator. Jumpers are always set to INT (internal,
shorting pins 2 and 3) for Vector-LP transmitters.
E3
PDM High/Low
Bi-position selection jumper used to configure the RF
synthesizer PWB for high PDM (nominal 130 kHz) or low
PDM (nominal 65 kHz). Always set to HIGH PDM (shorting
pins 2 and 3) for Vector-LP transmitters.
E4
RF Drive Source
Bi-position selection jumper used to configure the RF
synthesizer PWB to use either the output of an integral
crystal controlled oscillator or an external RF generator as
the RF drive source. Always set for INT (internal gc, shorting
pins 2 and 3) for Vector-LP transmitters.
E5
Drive Matching
Seven selection jumper (A-G) used to configure the RF drive
circuit for its host transmitter. The jumper is installed in the D
position (shorting pins 7 and 8) for Vector-LP transmitters.
E6
Symmetry
Adjust
Enable/Disable
Bi-position selection jumper used to enable or disable the RF
drive symmetry adjustment circuitry. Always set to ENABLE
(E6 installed between pins 1 and 2 of its 3-pin header) for
Vector-LP transmitters.
R32
RF DRIVE
SYMMETRY
Adjusted to obtain an RF oscillator drive waveform that is a
symmetrical square wave.
R41
IPM BAL
Not applicable to Vector-LP transmitters.
S1-S5
X1000
X100
X10
X1
X0.1
Adjusts the carrier frequency in 1000 kHz steps.
Adjusts the carrier frequency in 100 kHz steps.
Adjusts the carrier frequency in 10 kHz steps.
Adjusts the carrier frequency in 1000 Hz steps.
Adjusts the carrier frequency in 100 Hz steps.
S6:1/2/3
S6:4
Correction
Selection
Enable/Disable
Not applicable to Vector-LP transmitters.
Always closed for Vector-LP transmitters.
To Next Page
Loading...
