Ceyear 4992A, User Manual

Page: 17 / 134

Chapter I Overview
5

External AM characteristics
Microphone input:
Level range: 20mVrms to 350mVrms
Frequency range: 300Hz
～
3kHz
Amplitude range: 0-80%
Audioinput:
Load: 150Ω, 600Ω, 1kΩ, High Z
Input level: 0.05-3Vp
Frequency range: 300Hz~5kHz
Tuning sensitivity: 1%/35mVrms

Internal FM characteristics (Audio 1 and Audio 2)
Modulation frequency: 30Hz to 5kHz (acceptable setting: 20Hz-20kHz)
Frequency deviation range: max. 100kHz
Resolution: 0.01Hz
Accuracy:

5% (100kHz frequency deviation, 150Hz-5kHz modulation rate)
Total harmonic distortion: 3% (1kHz modulation rate, frequency deviation of more than
2kHz, 300Hz-3kHz BP filter)

External FM characteristics
Microphone input:
Level range: 20 mVrms-350mVrms
Frequency range: 300Hz~3kHz
Frequency deviation range: max. 80kHz
Slope: positive frequency deviation corresponding to positive voltage
Audioinput:
Load: 150Ω, 600Ω, 1kΩ, High Z
Input level: 0.05Vp to 3Vp
Frequency range: 300Hz
～
5kHz
Tuning sensitivity:1kHz/35mVrms
Slope: positive frequency deviation corresponding to positive voltage
2. Audio source (Audio 1and Audio 2)
Frequency range: 20Hz~20kHz
Frequency resolution: 0.1Hz
Frequency accuracy:

2Hz (standard)
Output level: 20mVrms to 1.57Vrms
Output level resolution: 0.01Vrms
Output level accuracy:

(5%+5mV)
Output impedance: about 5.62Ω
Output current:
<
15mA
Harmonic distortion: < 3% (1kHz, 1Vrms)
Output: single-tone, dual-tone, noise, single-tone + noise
3. RF meter
RF input port: ANT port and T/R port
Frequency range: 2MHz~1000MHz (1 GHz option default)
2MHz
～
2700MHz (2.7 GHz option)

RF power (T/Rport broadband input)
Measurement range: 10-43dBm (0.01W-20W)
Optional external20dBattenuator (50W, 150W and 200W)
Maximum input level: 20W/43dBm at +25
℃
for 10min, or until the overheating alarm
is sent.
The ON and OFF state of the tested signal can be switched.
Resolution: 0.01W/0.1dBm