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1.4 Specifications
1.4 Specifications
Inputs (50 Ω source)
Amplifier
Outputs (into 50 Ω)
General
SIM914 350 MHz Preamplifier
Input signal level
Bias current (note 1)
Protection (DC)
Protection (1 s transient)
Recovery time (10 FS overload)
Noise (10 Hz)
Noise (100 Hz)
Noise ( 1 kHz)
Noise (1 Hz to 300 MHz BW)
Crosstalk (CH1 out to CH2 in)
Crosstalk (CH2 out to CH1 in)
Gain (note 2)
Bandwidth ( 3 dB)
Rise/fall time
Propagation delay
Source impedance
Linear operation
Overload level
Number of Channels
Operating temperature
Supply current
Notes:
1. The input bias current flows out of the unit, creating a positive offset
of about 150 V on the 50 Ω input termination. This offset will be
affected by the DC impedance of the source that is connected to the
input.
2. Amplifier gain is calibrated by applying a known current to the input
and measuring the voltage into a high impedance load. The gain
is adjusted so that a 1 mA source applied to the input produces a
500 mV voltage at the unloaded output.
Min
200
Impedance
49.5
Return loss
Offset
500
Offset drift
10
4
50
4.95
49.5
1.0
1.3
Limit level
1.6
0
Weight
Power
Dimensions
1.5" W
1 – 5
Typ
Max
Units
+200
mV
50
50.5
Ω
32
dB
+500
V
V/ C
+10
3
10
A
VDC
+4
+50
V
3
ns
22
nV/ Hz
8.6
nV/ Hz
5.2
nV/ Hz
80
Vrms
61
dB
82
dB
5.00
5.05
V/V
350
MHz
1.3
ns
2.7
ns
50
50.5
Ω
V
+1.0
V
+1.3
+1.6
V
2
40
C
1.4
lbs
5
VDC
80
mA
3.6" H
7.0" D
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