Ceyear 4992A, User Manual

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Chapter I Overview
9
-3V to +3V (if the range setting reaches 3V)
-30V to +30V (if the range setting reaches 30V)
-60V to +60V (if the range setting reaches 60V)
Horizontal:
Range: 0.2ms per interval to 50ms per interval, according to the sequence 1/2/5
Accuracy: ±3%, within the full range
Vertical:
Range: FM demodulation: vertical scale of 100Hz to 1kHz per interval, according
to the sequence 1/2/5
AM demodulation: vertical scale of 5%, 10%, 20% or 50% per interval
DVM and audio input: vertical scale of 10mV to 20V per interval, according to
the sequence 1/2/5
Accuracy: ±10% (

1 level for external input audio/DVM signal)
Coupling:
Audio input: AC
DVM input: AC, DC
Input impedance:
DVM input: 1MΩ
Audio input: 150Ω, 600Ω, 1kΩ, High Z
Band width: 20kHz
9. Cable test
Frequency range: 2MHz
～
1000MHz
Frequency resolution: 0.1MHz
Cursor: 3
Test type: standing wave ratio (SWR), return loss (RL), cable loss (LOSS) and
distance-to-fault (DTF).
VSWR measurement accuracy (using 25Ω air line as the calibration device): SWR reading
±10% (calibration value) in the case of no more than 500MHz
SWR reading ±20% (calibration value) in the
case of more than 500MHz
DTF measurement range: 1m to 100m
Resolution: 0.01m
Rate: 0.00 to 1.00, automatically selected according to the cable type or
manually entered by the user
Measurement accuracy: ±10%
10. Internal time base
Aging rate: <1

10
-6
/year;
Temperature stability: 1

10
-6
(with 25
℃
as the reference temperature)
Frequency accuracy: ±2ppm (25
℃
)
CAUTION:
4992A Radio Test Set will meet various performance
indicators within the given working temperature after 2h
storage at the ambient temperature and 15min preheating.
Supplementary features in the form of typical value are
！