• Wide frequency coverage 100 KHz to 260 MHz
• Six digit LED display
• Calibrated level output down to 0.03µV into 50 Ohms
• Low spurious output & harmonics
• RF level, AM & FM indication
• Compact and small in size
• External 12V DC operation
• Negligible RF radiation

2356/2356A is a compact field portable AM/FM Signal Generator in the frequency range of 100 KHz to 260MHz (400 KHz to 225 MHz for 2356A), with clean RF signals having harmonics less than -25 dBc & virtually no non-harmonics. It is ideal for testing receivers, amplifiers, antenna filter networks. Excellent accuracy is achieved due to automatic level control in oscillator & amplifier stages. Effective RF shielding enables receiver sensitivity measurements down to 0.1µV. The LED display enables accurate tuning of receivers.

Specifications

Frequency
• Range : 100 KHz to 260 MHz (2356)
400 KHz to 225 MHz (2356A)
in suitable Bands
• Band I : 0.1 to 10 MHz (2356)
0.4 to 10 MHz (2356A)
• Band II : 10 to 14 MHz
• Band III : 14 to 22 MHz
• Band IV : 22 to 32 MHz
• Band V : 32 to 44 MHz
• Band VI : 44 to 62 MHz
• Band VII : 62 to 86 MHz
• Band VIII : 86 to 124 MHz
• Band IX : 124 to 176 MHz
• Band X : 176 to 260 MHz (2356)
: 176 to 225 MHz (2356A)
• Display : 6 Digit LED Display
: with 1KHz resolution.
• Accuracy : + 0.02% + 1 count.
• Stability : + (1KHz + 20 ppm) /5min. above 10MHz,
+ 2 KHz /5 min. below 10 MHz after 2 hours warm up. Setting period 15 minutes when frequency is changed.
Spectral Purity
(above 10 MHz)
• Harmonics : Less than -25 dBc
• AM on CW : Less than 0.5%
• FM on CW : Less than 200 Hz
• AM on FM : Less than 5% upto 30 KHz internal FM
• FM on AM : : Less than 500 Hz at 30% internal AM

Spurious signals are measured in 0.3 to 3KHz post detection BW
Output
• Range : 1 µ V to 300 mV (- 110 to 0 dBm) into 50 Ohms.
-7 to +3 dB Vernier, - 137 dBm with 20 dB pad.
• Accuracy : + 2 dB
• Impedance : 50 Ohms nominal
• V.S.W.R. : < 1.5 : 1 (<-10 dBm)
Amplitude Modulation
• Internal Source : 1 KHz + 10% sine & 400 Hz + 10% sine
• Output : 5 V rms (Approx.)
• Depth : 0 to 80%
• Accuracy : + 5% of the reading
+ 5% of the FSD
• Distortion : Less than 5% at 30% depth
• External frequency response
: Within + 1dB from 50KHz to 10 KHz w.r.t. 1Hz (usable upto 20 KHz)
Frequency Modulation
• Internal Source : 1KHz + 10% sine & 400 Hz + 10% sine
• Output : 5 V rms (Approx.)
• Peak Deviation : 0 to 10 KHz & 0 to 100 KHz
• Accuracy : + 20% of the FSD
• Distortion : Less than 5% upto 80 KHz deviation
• External frequency : Within + 1 dB from 50 Hz to 15 KHz
response w.r.t. 1 KHz (usable upto 20 KHz)
• RF Leakage : With the output level less than 10 mV and output terminated, voltage induced into a twin 25 mm dia. loop, 25 mm away from any surface of the generator is less than 2µV.
Sinad Measurement : Optional
General
• Power requirement : 230 V AC + 10%
• Frequency : 50 Hz + 10%
• External DC : 12V +1V, 2A
• Temperature Range