DANIELS
ELECTRONICS LTD.
TM
5-6
IM10-VR3H040-AB VHF Enhanced Extra Wideband Receiver Instruction Manual
5.3.2
Synthesizer Test Points
Analog Board Component Layout (Top)
Common to all synthesizer family members.
TP1 +8.0 ±0.3 Vdc
.
U6 positive regulator output.
TP2 +5.0 ±0.1 Vdc
.
U7 positive regulator output.
TP3 +5.0 ±0.1 Vdc
.
U8 positive regulator output (always on).
TP4 PLL error voltage. Normal range is +0.5 to +4.5 Vdc (depending on frequency)
.
Nominally adjusted for +2.3 Vdc (via C24) for center channel
.
Digital Board Component Layout (Bottom)
TP1 +5.0 ±0.1 Vdc
.
U2 positive regulator output (controlled via pin P2-4).
TP2 Microcontroller E clock
.
2 MHz logic level square wave.