Vxo And Afa Buffer Tests; Figure 64. Temporary Connection From C72 To C54 - NORCAL NC2030 Manual

VXO and AFA Buffer Tests

Figure 64. Temporary connection from C72 to C54

First install a temporary wire connection from C72 to C54 as shown above. Use a short length of # 32
gauge enamel wire to make the connection. This connection will allow the SSS AFA to measure the
frequency of the VXO.
Apply the 9v battery voltage. Listen for the AFA and the Keyer sign on messages. The Keyer sends
"FB", while the AFA sends "2T3T".
Press the AFA button and hold it down. It should cycle through "E" "L" "F" "ER" "LR" "FR" and then
repeat the sequence again at a slower speed. Stop at "L", the "long" frequency readout mode. The AFA
should send the entire frequency down to the 1 Hz granularity. 11.059000 MHz would be read out as
"11 R 059 R 000". 11.059 MHz is the 20m VXO crystal frequency, while 13.0 MHz is the 30m VXO
Norcal NC2030 v5 12-18-05
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