1203D Matched Phase Broadband RF Distribution

The ptf 1203D Broadband RF Distribution amplifier provides high performance distribution of frequency references for laboratory or system use, with very low channel to channel phase skew, and very low phase change temperature coefficient.
The ptf 1203D uses a carefully designed transmission line layout to distribute the input signal to 12 separate outputs, to ensure
minimum phase difference between individual output signals.
In most applications the phase noise capability of the ptf 1203D will outperform the input signal performance to such a degree
that no additive phase noise will be noticeable on the outputs.

Isolation output to output is >80 dB and no harmonic exceeds -40 dBc. The unit provides a nominal gain of 1, and all outputs are provided on TNC connectors. Input to output voltage gain of unity (up to x 10 optionally available) provides up to 13dBm into a 50 ohm load.
BNC available, but not recommended for low electrical length temperature coefficient.
Option -1 Standard unit ± 8.0 ps/deg.C
Option -2 Very low phase delay ± 1.3 ps/deg.C temperature coefficient

• Input Frequencies 300kHz to 60MHz
• 12 Broadband Outputs
• Low Additive Phase Noise
• Isolation (>80dB typical)
• Convenient 1U, 19″ rack mount package

RF Output (twelve)  
Freq. Range (-3dB BW) 300kHz to 60MHz
Braodband Outputs
Level 1V rms (nominal)
No Harmonic Exceeds -40 dBc
Non-Harmonic Signals < -80 dB
Load Impedance 50 ohm
Isolation >80 dB*
Connectors TNC

*Isolation of alternating output channels >100dB, up to 30MHz

Additive SSB Phase Noise  
(1 Hz Bandwidth) Offset from carrier  
1 Hz < -120 dBc/Hz
10 Hz < -135 dBc/Hz
100 Hz < -145 dBc/Hz
1,000 Hz < -155 dBc/Hz
10,000 Hz < -160 dBc/Hz
Channel to Channel Skew <250ps
Input to output delay <5ns
nom. @ 10MHz

Input to output temp. coeff  
Option -1 |tempco| < 8.0ps / deg C
Option -2 |tempco| < 1.3ps / deg C
  (Over +17 to +31 deg C)

Input VSWR < 1.5:1
(1MHz to 60MHz) ( 1.2:1 typical)
(at 10MHz) < 1.04:1
Output VSWR < 1.5:1
(1MHz to 60MHz) ( 1.2:1 typical)
(at 10MHz) < 1.04:1
RF Input  
Frequency Range 300kHz to 60MHz
Max Input Level 1 V rms
Alarm Output Summary Alarm
  (Alarms if at least
one output is
< -10dBm, nominal)
Non-alarm condition: Relay energized
(fail safe)
Alarm Connector: 9 pin D-male
(SPDT contacts)
Controls & Indicators  
Power Green LED,
(power connected)
Alarm Indicator Red LED,
(output failure,
input not present)

Environmental & Physical  
Temperature: 0° to 55° C operating
  -20° to +85° C storage
Relative Humidity: 0 to 95%, non-condensing
Power Requirements  
AC Input (±15%) 90 - 264 VAC, <10W
DC Input (optional)  
Dim. (HxWxD): 1U (1.752”) x 19” x 16”
Weight 4 lbs.

1203D Matched Phase Broadband RF Distribution PDF DOCUMENT