|
|
SYSTEM SPECIFICATIONS |
| The
following are typical and apply for 70dB gain, 20Hz – 20kHz, RS
= 150 ohms, RL = 100k ohms, and TA = 25°C unless
otherwise noted. |
|
| Preamplifier |
| Channels |
balanced,
symmetrical |
|
Model 4 |
1 |
|
Model 5 |
2 |
| Input |
|
|
Impedance, differential-mode |
2M
ohms |
|
Phantom |
13.6k
ohms |
|
Low Input Z |
1k
ohms |
|
Common-mode |
1M
ohms |
| Maximum
level |
See
Dynamic range graph |
|
Equivalent input noise |
See Dynamic
range graph |
|
Common-mode
rejection ratio |
>110dB |
| Bandwidth |
2Hz –
300kHz |
| Frequency
response |
±0.01dB |
| Gain range |
10 - 70dB |
|
Control resolution, Model 4 |
5dB |
|
Accuracy |
±0.1dB |
|
Tracking |
0.1dB |
| Crosstalk,
Model 5
(200kHz) |
<-140dB |
| Peak
indicator level, Model 4 |
+24dBu |
|
Hold time |
100ms |
| Output |
|
|
Impedance, common-mode |
6
ohms |
| Maximum level (RL = 600
ohms) |
+30dBm |
|
Offset |
±0.1mVdc |
| Phantom supply |
+48Vdc,
14mA/ch |
| Power supply |
|
|
Voltage options (50 – 60Hz) |
100, 120,
240Vac |
|
Operating range |
±15% |
|
Power consumption |
|
Model 4 |
16VA |
|
Model 5 |
25VA |
|
Leakage current (120Vac, 60Hz) |
20uA |
| Dimensions |
1U, 19in rack
mount |
|
Model 4 |
10in
(254mm) D
FMS |
|
Model 5 |
14in
(356mm) D FMS |
| Weight |
|
|
Model 4 |
7.6lb
(3.4kg) |
|
Model 5 |
11lb
(5.0kg) |
|
| Gain
control |
|
| Channels
|
|
|
GC32 |
2 |
|
GC34 |
4 |
| Control
range |
10 - 70dB |
|
Resolution |
5dB |
| Peak
indicator level |
+24dBu |
|
Hold time |
100ms |
| Dimensions
|
1U,
19in rack mount, |
|
3in
(75mm)D FMS |
| Weight
|
|
|
GC32 |
1.8lb
(0.8kg) |
|
GC34 |
2.2lb
(1.0kg) |
|
|
Dynamic range vs gain
|
Dynamic
range is the difference (in dB) between the maximum input
level "ceiling" and the equivalent input noise "floor".
The maximum input level is limited only
by the maximum output level of +31dBm at or less than 0.1%THD, as the output stage clips before
the input stage at all gain settings. |
|
|
