18 34980A Service Guide
2 Specifications
RF and Microwave Module Specifications and Characteristics 
[1]
 50  source, 50  load (75  for 34942A)
[2]
 For more detailed specifications, see the N1810TL for the 34946A and N1810UL for the 34947A. The M9046A and M9047A 
requires N1810 Switch Options 124 (24 volt coils), 201 (D submin. 9-pin conn.), and 402 (Position Indicators)
DC to 3 GHz DC to 20 GHz 
[2]
34941A 34942A 34946A 34947A
Channels quad 1x4  quad 1x4  2 SPDT 3 SPDT
Switch type  50  
unterminated,
latching relays
75  
unterminated,
latching relays
50  terminated 50  unterminated
RF characteristics
Frequency range 
[1]
DC to 3 GHz DC to 1.5 GHz DC to 4 GHz 
or
DC to 20 GHz
DC to 4 GHz 
or
DC to 20 GHz
Insertion loss
(< 40°C/80% RH) 
[1]
 100 MHz
 1 GHz
 3 GHz
0.15 dB
0.60 dB
1.40 dB
0.15 dB
0.60 dB
N/A
DC to 4 GHz < 0.42 
dB
@ 20 GHz < 0.69 dB
DC to 4 GHz < 0.42 
dB
@ 20 GHz < 0.69 dB
VSWR
 100 MHz
 1 GHz
 3 GHz
1.03
1.25
1.55
1.15
1.35
N/A
DC to 4 GHz < 1.15
@ 20 GHz < 1.30 
DC to 4 GHz < 1.15
@ 20 GHz < 1.30 
Isolation (dB)
 [1]
 100 MHz
 1 GHz
 3 GHz
Contact Factory
80 dB
58 dB
40 dB
Contact Factory
80 dB
60 dB
N/A
DC to 4 GHz > 85 
dB
@ 20 GHz > 67 dB
DC to 4 GHz > 85 dB
@ 20 GHz > 67 dB
Spurious noise
  below 1.3 GHz
–140 dBm
–140 dBm
80 dB
80 dB
Risetime < 80 ps  < 160 ps N/A N/A
Signal delay < 1 ns < 1 ns N/A N/A
Capacitance < 30 pF  < 30 pf N/A N/A