Updated to make the frequency read out correctly (positive numbers). Notes:

- Rig-to-GQRX seems to work.
- GQRX-to-Rig seems to work.
- Frequency scale increases left to right.
- Frequency scale uses positive numbers.
So, seems to be functioning, but needs more extensive testing.

gqrx-panadapter.py

@@ -35,8 +35,8 @@ GQRX_WAIT = 4
 delay_secs = 0.5
 timeout = 0.0
 
-usb_if_offset = -2250
-lsb_if_offset = 0
+usb_if_offset = 0 #-2250
+lsb_if_offset = -1000 #0
 
 rs = 0
 gs = 0
@@ -48,11 +48,13 @@ def calc_lnb_lo(freq, ifreq, isusb=True):
     if isusb:
         if DEBUG:
             print('USB IF: ' + str(ifreq + usb_if_offset))
-        return - freq - (ifreq - usb_if_offset)
+        #return - freq - (ifreq - usb_if_offset)
+        return freq + usb_if_offset - ifreq
     else:
         if DEBUG:
             print('LSB IF: ' + str(ifreq + lsb_if_offset))
-        return - freq - (ifreq + lsb_if_offset)
+        #return - freq - (ifreq + lsb_if_offset)
+        return freq + lsb_if_offset - ifreq
 
 def get_rig_freq(rs):
     rs.send(b'm\n')
@@ -77,13 +79,13 @@ def set_rig_freq(rs, gs, freq, ifreq, isusb):
     if DEBUG:
         print('Set GQRX Freq: {}'.format(freq).encode())
 
-    gs.send('F {}'.format(-1 * freq).encode())
+    gs.send('F {}'.format(freq).encode())
     gs.recv(1024)
 
 
 def get_gqrx_freq(gs):
     gs.send(b'f\n')
-    return int(gs.recv(1024)) * -1
+    return int(gs.recv(1024)) #* -1
 
 def set_gqrx_freq(gs, freq, ifreq, isusb):
     lnb = calc_lnb_lo(freq, ifreq, isusb)
@@ -97,7 +99,8 @@ def set_gqrx_freq(gs, freq, ifreq, isusb):
     if DEBUG:
         print('Set GQRX Freq: {}'.format(freq).encode())
 
-    gs.send('F {}'.format(-1 * freq).encode())
+    #gs.send('F {}'.format(-1 * freq).encode())
+    gs.send('F {}'.format(freq).encode())
     gs.recv(1024)
 
 def main():