• 1040 MHz synthesized output without doubling
• Wide output level 0.03 µV to 1V
• AM-FM and optional pulse modulation
• AF synthesizer for all common call tones
• Sweep facilities
• DC coupled AM and FM
• SINAD facility
• Negligible RF leakage
• IEEE 488 programmable
• 50W reverse power protected

Specifications

Frequency

• Range : 10 KHz to 1040 MHz (2424)
10 KHz to 600 MHZ (2424A)
• Resolution : 10 Hz ( < 128 MHz), 100 Hz (>128 MHz)
• Accuracy : +5E-8 ex-factory, 20°C
• Stability - Standard : +1E-6 (0 to 55°C)
+2E-7 per month
- Option 01 : +2E-7(0 to + 40°C)
+1E-7per month

RF Output
• Range : -137dBm to + 13dBm
(0.03 µV to 1 V p.d)
• Resolution : 0.1 dB
• Units : dBm, dBµV, mV, µV, pd, emf.
• Accuracy (carrier level : +1dBm at +13 dBm
> -127 dBm) +1.5dB (<500MHz)
+2.5 dB (> 500 MHz)
• Source impedance : 50 ohms
• VSWR : <1.5:1 (<-3 dBm)
• Reverse power protection : 50 W Max. DC-1040MHz(User reset)
• Trip level : 200 mW typical

Spectral Purity
• Harmonics : < - 25 dBc (carrier <+7 dBm)
< - 30 dBc (typical)
• Non-Harmonics : < - 60 dBc
• Residual FM : <50 Hz r.m.s. at 1040 MHz (CCITT P53A) improving 6dB/octave to <1.25 Hz r.m.s. at 16 MHz, <6Hz r.m.s. below 16 MHz
• Residual AM : <0.1 % (50 Hz to 15kHz bandwidth)
• SSB noise : Typical characteristics shown for carrier frequencies of 80 & 800 MHz (Fig. 1)
• Noise Floor : <-130 dBc
• AM on 20kHz FM : 0.5% (50Hz to 15 kHz Band width) 1 kHz rate.
• FM on 30% AM : <200 Hz (50 Hz to 15 kHz band width),
1 kHz rate
• RF Leakage : <0.5µV (induced in 2 turn 25 mm loop 25 mm away)

Amplitude Modulation
• Depth : 0 to 99.9%(< 500 MHz <+7 dBm)
: 0 to 50% (>500MHz <+7 dBm)
• Resolution : 0.1 %
• Accuracy : + 5 % of reading (<90 % depth)
• Bandwidth (+ 1 dB) : d.c./10 Hz to 25 KHz
• Distortion : < 2% at 50% depth, 1 KHz rate.

Frequency Modulation

• Max. Peak Deviation : 250 KHz (10 KHz to <16 MHz)
62.5 KHz (16 MHz to <32 MHz)
125 KHz (32 MHz to <64 MHz)
250 KHz (64 MHz to < 128 MHz)
500 KHz (128 MHz to <256 MHz)
1000 KHz (256 MHz to <512 MHz)
1000 MHz (> 512 MHz)

• Resolution : carrier frequency >64MHz
: 10Hz (< 5% Max. peak)
100Hz (>5% Max. peak)
• Carier frequency : <64MHz
10Hz (10% Max peak deviation)
100Hz (>10% Max peak deviation)
• Accuracy : +5% of reading
• Bandwidth (+ 1 dB) : d.c./50 Hz to 25 KHz
• Distortion (THD) : <1 % < 10 KHz deviation 1 KHz rate

Phase Modulation
• Deviaton : 0 to 3 rads.
• Resolution : 0.01 rad.
• Accuracy : + 20% of reading excluding residual PM
• Bandwidth (+ 1 dB) : 50 Hz to 10 KHz
• Distortion (THD) : < 2% at 1KHz rate, 300 Hz to 3 KHz band width.

Internal Modulation Sources
• Synthesizer range : 10 Hz to 9.999 KHz
• Resolution : 0.1 Hz <1 KHz, 1 Hz > 1 KHz
• Accuracy : +2E-5
• Distortion : <2% <5KHz
• Output (Synthesized) : 0 to 1 V r.m.s. (emf, 50 ohms) in 1 mV steps.
• Single spot frequency : 1 KHz
• Accuracy : +2E-5
• Distortion : <0.2%
• Simultaneous tones : Ratio fixed to variable tone 5 : 1
• Internal 1 KHz output : 1 V r.m.s. (emf, 50 Ohms)
Sequential Tones
• System covered : CCIR, EEA, ZVEI-1, ZVEI-2. EIA, NATEL

External Modulation
• Impedance : 50 Ohms
• Level : 1 V r.m.s. for f.s.d. (front panel control adjustment)
• Indication : Analogue meter (scaled 0 to I with CAL marker)
• Simultaneous tones : The external input may be mixed with the internal synthesizese Ratio of external tone to internal tone 5 : 1

Pulse Modulation (Option 02)
• Frequency range : 25 MHz to 1040 MHz (2424)
25 MHz to 600 MHz (2424A)
• Carrier on/off ratio : 60 dB at 70 MHz
45 dB at 500 MHz
40 dB at 800 MHz
• Pulse rise time : 2 µs
• Pulse fall time : 1 µs
• Minimum Pulse width : 4 µs
• Modulator lnsertion loss : <4.5 dB
• TTL Logic Drive : TTL high = (Carrier ON) Max. 5 V peak
(Max 5 V pk) TTL low = (Carrier OFF)
• Carrier Leakage : <0.5µ V (induced in 2 turn 25 mm loop 25 mm away carrier level < - 3 dBm)
Sinad
• Input Frequency : 1 KHz
• lnput Level : 30 mV to 3 V r.m.s.
• Indication : analogue meter, scaled range 30 dB to 6 dB
• Impedance : > 7/5 K ohms
• Bandwidth (+ 3dB) : 60 Hz to 6 KHz
Sweep
• Functions : Carrier frequency, Carrier level, Modulation frequency, Modulation level.
• Range (Start, Stop) : Any within setting range
• Total sweep time : 2 seconds to 200 seconds.
General
• Programmability : GPIB (IEEE 488)
• Memory : 100 complete front panel set-ups, Last
(Non-Voletile) front panel set-up, IEEE 488 address
• Internal crystal reference : TCXO, 10MHz.
• Internal reference output : 3 V pk. - pk. (emf 50 ohms)
• External reference frequency : 10MHz
• External reference level : 1 V r.m.s.
• Voltage Input : 220/240 V + 10% AC
• Frequency : 45 Hz - 440 Hz
• Ext. DC Input : 11.5 to 15 V
• Power Consumption : 30 VA max.
• Operating Temperature : 0 to 55°C
• Humidity : 95% RH at 40°C non condensing
• Dimensions (approx.) : Height (Incl. feet) 145 mm
Width 330 mm
Depth 405mm
• Weight (approx.) : 8.6 kg
• Accessories Standard : N to BNC adaptor
- BNC to BNC cable
- Mains lead
- Instruction/Service Manual
- DC Power Cord
- PCB Extractor