Elecraft KSB2 - Manual (Page 15)

15
Initial Test
Turn on the K2 and verify that you see the usual ELE CRAFT display. If you see INF O 080 or no
display, you may have the SSB adapter plugged in incorrectly. If it appears to be installed correctly, unplug
the adapter and look for a short to ground on one of the pins of P1.
Tap the M E N U button, then use the B A N D + / B A N D - buttons to get to the SSB A and SSB C
menu entries. If you see "--" displayed for SSB A and SSB C, the SSB adapter's microcontroller is not
communicating with the main processor on the Control board. Make sure U1 on the SSB adapter is not
plugged in backwards. Also verify that R12 is installed (470 ohms).
Tap M O D E to select CW mode. Set the RF GAIN to max; AF GAIN, mid-way; preamp ON.
Switch to 40 meters using B A N D + / B A N D - . Connect an antenna and headphones or speaker.
Verify that the K2 performs the same on CW receive as it did prior to installing the SSB adapter. The
filters you had set up should sound the same, and there should be no loss of signal strength. If signals
appear to be weaker, see Troubleshooting.
BFO Test
Connect the K2's internal frequency counter cable to TP2 (BFO) through the hole labeled "TP2" near
the center of the SSB module. Tap the M E N U button and scroll to the CAL menu entry. Then hold E D I T
and scroll the CAL parameter until you see CAL FCTR. Hold E D I T a second time to activate the
frequency counter display. You should now see a BFO frequency reading between 4910 and 4918 kHz on
the LCD. The last digit may flicker. If the reading is 0000.00 or out of range, the SSB adapter may be
loading down the BFO signal. Check C42, RP3, L1, C25, and C26 on the adapter. Look for shorts or opens
in this part of the circuit. Also see Troubleshooting.
Receive-Mode SSB Filter Test
Selecting the Fixed-Bandwidth SSB Filter
If you're still in CAL FCTR mode, tap M E N U . Select 40 meters using B A N D + / B A N D - .
Switch to LSB mode using the M O D E button, and use X F IL to select FL1.
Use the menu to select CAL FIL and activate the filter setup display. You'll see filter FL1's setting
displayed. If a bandwidth number appears after FL1, e.g. FL1 2.20 L , it indicates that the variable-
bandwidth CW filter is presently being used for SSB receive. The small "L" indicates LSB mode.
Use the VFO knob to change the setting for FL1 to FL1 OP1 L . (OP1 is the next available setting
after 2.4 9. "OP1" refers to the first option filter, in this case the fixed filter on the SSB adapter.) You
should hear a pronounced difference in the receiver's audio when you go from 2.4 9 to OP1 , since this
causes the SSB adapter to switch between the CW filter and the SSB filter. Leave the filter set for
FL1 OP1
L . Note: OP2 - OP5 also select OP1 since only one fixed filter is available on the KSB2.