19 | Keysight | 34980A Multifunction Switch/Measure Unit - Data Sheet
Table 6. RF and microwave selection table—speciꢁcations and characteristics
DC to 3 GHz
DC to 26.5 GHz [3]
34941A
34942A
34946A
34947A
Channels
quad 1x4
quad 1x4
2 SPDT
3 SPDT
Switch type
50 Ω unterminated,
75 Ω unterminated,
50 Ω terminated
50 Ω unterminated
latching relays
latching relays
RF characteristics
Frequency range [2]
DC to 3 GHz
DC to 1.5 GHz
DC to 4 GHz,
20 GHz or
26.5 GHz
DC to 4 GHz,
20 GHz or
26.5 GHz
Insertion loss [2]
(< 40 C/ 80% RH)
DC to 4 GHz < 0.42 dB,
@ 20GHz < 0.69 dB,
@ 26.5GHz < 0.8 dB
DC to 4 GHz < 0.42 dB,
@ 20 GHz < 0.69 dB
@ 26.5GHz < 0.8 dB
100 MHz
1 GHz
3 GHz
0.15 dB
0.60 dB
1.40 dB
0.15 dB
0.60 dB
N/A
VSWR
DC to 4 GHz < 1.15,
@ 20 GHz < 1.30,
@ 26.5GHz < 1.6
DC to 4 GHz < 1.15,
@ 20 GHz < 1.30,
@ 26.5GHz < 1.6
100 MHz
1 GHz
3 GHz
1.03
1.25
1.55
1.15
1.35
N/A
Isolation (dB) [2]
Contact factory
Contact factory
DC to 4 GHz > 85 dB,
@ 20 GHz > 67 dB,
@ 26.5GHz > 60 dB
DC to 4 GHz > 85 dB,
@ 20 GHz > 67 dB,
@ 26.5GHz > 60 dB
100 MHz
1 GHz
3 GHz
80 dB
58 dB
40 dB
80 dB
60 dB
N/A
Spurious noise
below 1.3 GHz
–140 dBm
< 80 ps
< 1 ns
–140 dBm
< 160 ps
< 1 ns
80 dB
N/A
80 dB
N/A
Risetime
Signal delay
N/A
N/A
Capacitance
< 30 pF
< 30 pf
N/A
N/A
Switching characteristics
Max volts [1]
30 V
30 V
7 VDC
N/A
7 VDC
N/A
Max current
0.5 A
10 W [5]
10 μV
1 Ω
0.5 A
10 W [5]
10 μV
1 Ω
Max power (W)
Offset voltage
1 W @ 7 VDC, 50 W peak [4] 1 W @ 7 VDC, 50 W peak [4]
N/A
N/A
N/A
N/A
Initial channel resistance
Volt-Hertz limit
General characteristics
Relay life
2 x 1010
2 x 1010
300,000 at 30 V/10 mA load; 300,000 at 30 V/10 mA load > 5 M cycles,
> 5 M cycles,
100,000 at 10 W load RF
SAmeas
100,000 at 10 W load RF
SAmeas
1 M w/drive 28-32 VDC
1 M w/drive 28-32 VDC
Open/close time
Connector type
Coil voltage
18 ms/18 ms
Female SMA
N/A
18 ms/18 ms
Mini 75 Ω SMB
N/A
< 15 ms/15 ms
Female SMA
24 VDC
< 15 ms/15 ms
Female SMA
24 VDC
Analog bus backplane
connection
No
No
No
No
[1] Channel-to-earth
[2] 50 Ω source, 50 Ω load (75 Ω for 34942A)
[3] For more detailed switch specifications, see the Keysight N1810TL, N1811TL, N1812UL for 34946A and N1810UL for the 34947A.
[4] 10 usec maximum duration
[5] Max power is 1 W between 30 MHz and 1 GHz for CISPR 11 compliance
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