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Distribution Amplifier FS730 & FS735 ... from $1250
FS730 & FS735 5 MHz distribution amplifiers
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FS730 & FS735 5 MHz Distribution Amplifiers
  • Sine wave outputs (+13 dbm)
  • Amplitude leveling
  • Low additive phase noise
  • High channel-to-channel isolation
  • High return loss
The FS730/FS735 Series Distribution Amplifiers are used to distribute a low noise 5 MHz frequency reference. Each amplifier has one input and seven outputs, all on BNC connectors. The input is coupled through a series LC network allowing the use of inputs with a DC offset. The input source impedance is 50 Ω at 5 MHz.
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FS730 & FS735 5 MHz Distribution Amplifiers

The FS730/FS735 Series Distribution Amplifiers are used to distribute a low noise 5 MHz frequency reference. Each amplifier has one input and seven outputs, all on BNC connectors. The input is coupled through a series LC network allowing the use of inputs with a DC offset. The input source impedance is 50 Ω at 5 MHz.

The input is conditioned by a limiter which provides several advantages. It removes amplitude modulation from the input signal, outputs have fixed amplitude, and input noise that occurs more than 50 mV away from the zero-crossing is blocked. Virtually any waveform with a duty cycle near 50% may be used as an input.

The input limiter is followed by a bandpass filter and a fixed gain amplifier. This signal is passed to seven output amplifiers, each of which is followed by a low pass filter and an output transformer. All of the outputs have 50 Ω source impedance and provide a 1Vrms (+13 dBm) sine wave into a 50 Ω load.

There are four indicator LEDs. The “power” LED indicates that the unit has AC power. The “signal” LED indicates that an input signal is present. The “overload” LED indicates that the input signal has excessive amplitude. The “fault” LED indicates one or more of these conditions: no input signal, excessive input signal, no output signal, or low internal DC power supply.

Configuration

The FS73x series of products can be configured as half-width, 1U, benchtop instruments (FS730) shown above, or in full-width, 1U, 19" rack-mount enclosures (FS735) shown below.

The FS730/2 model provides 7 output BNC connectors on the front panel, and can be rack mounted with an optional rack mount kit.

The FS735/2/2 model provides 14 output BNC connectors on the rear panel, with status indicators on the front panel. Several types of distribution amplifiers are available as listed below. Different types may be combined within the FS735 chassis.

 

Option 1 - 10 MHz distribution amplifier
Option 2 - 5 MHz distribution amplifier
Option 3 - CMOS logic distribution amplifier
Option 4 - Broadband 50 Ω distribution amplifier
Option 5 - Broadband 75 Ω distribution amplifier

 

 

 

 

Phone: (408)744-9040 • Fax: (408)744-9049 • email: info@thinkSRS.comwww.thinkSRS.com

FS730 & FS735 5 MHz Distribution Amplifiers
Input
Frequency 5 MHz, ±1 %
Level 0 dBm to +16 dBm  (0.6 Vpp to 4 Vpp)
Waveform Any with ≈ 50 % duty   
Impedance 50 Ω, ±5 % at 5 MHz
Coupling Series LC (Open at DC)
Output
Waveform Sine
THD <1 %
Level (50 Ω load) +13 ±1 dBm (1 Vrms, 2.82 Vpp)
Level (high-Z load) 2 Vrms (5.6 Vpp)
Impedance       50 Ω, ±5 % at 5 MHz
Coupling Transformer (short at DC)
Bandwidth ±100 kHz (-3 dB)
Spurious < -120 dBc within 100 kHz
Isolation >100 dB (1)
Pulling  <1 ps (1,2)
TC of phase ≈ -5 ps/°C
Additive phase noise  (with +7 dBm input)
Offset (Hz)       
Noise (dBc/Hz)
1
-125
10
-135
100
-146
1k
-155
10k
-158
100k
-158
General
Power 10 W, 100/120/220/240 VAC, 50/60 Hz
Dimensions
         FS730
         FS735

8.3" × 1.5" × 8.0" (WHL)
17" × 1.5" × 8.0" (WHL)
Warranty One year parts and labor on defects in materials and workmanship
 

(1) Measured with 1 Vrms at 5.001 MHz from a 50 Ω source applied to an adjacent output. The isolation increases at frequencies far away from 5 MHz.

(2) The pulling is comparable to that caused by a reflected wave from an unterminated cable on an adjacent output.

 
 
 
 
 
 
Phone: (408)744-9040 • Fax: (408)744-9049 • email: info@thinkSRS.comwww.thinkSRS.com