Contact us

Live Chat with Tek representatives. Available 6:00 AM - 4:30 PM PST.


Call us at 1-800-833-9200

Available 6:00 AM – 5:00 PM (PST) Business Days


Download Manuals, Datasheets, Software and more:


PSPL5547 Datasheet

15 GHz Bias Tee

The products on this datasheet are no longer being sold by Tektronix.
View Tektronix Encore for reconditioned test equipment.
Check support and warranty status for these products.


More Information

Read Online:

The PSPL5547 is a broadband, coaxial bias insertion tee and DC blocking capacitor. It was designed to have a very low cutoff frequency of only 5 kHz. It passes fast rise pulses with a minimum of waveform distortion. Its rise time is 23 ps. The frequency response is very flat, and the -3 dB bandwidth extends from 5 kHz to 15 GHz. The PSPL5547 is supplied with a 1 mH choke and terminal strip for connection to the DC bias.

Key performance specifications
  • 5 kHz to 15 GHz
  • 23 ps rise time
  • 50 V, 500 mA

Typical performance


1 dB/div log plot to 20 GHz Insertion Loss


1 db/div log plot to 20 GHz Insertion Loss


5 db/div log plot to 20 GHz Return Loss


Top to bottom: 500 ps/div, 100 ps/div, and 20 ps/div. Response to 15 ps rise time input step


2.5% rho/div and 200 ps/div. 35 ps TDR of AC port


Parameter Symbol Units Minimum Typical Maximum Comments
Impedance Z ohms  50    
Upper 3 dB frequency fc,hGHz 10  >15    
Lower 3 dB frequency fc,l kHz   12 kHz w/o inductor
Rise time tr ps  23  35  10 – 90%
Insertion loss S21dB  0.5    
Input (AC)
Return Loss
S11dB  23   f = 100 MHz
Refl. Coefficient (35 ps TDR) Γ %  -5   t > 200 ps
DC voltage V V   50   
DC current I mA   500   
Capacitance C μF  0.44   - 50%, + 80%
Inductance L mH  1.34   ±30% 1
Resistance R ohms  1.5    
RF power P W   Average power
Isolation S13dB  30    
DC path bandwidth fc,DCkHz    
RF Connectors SMA jacks (f)
DC Connector Solder pin
Warranty One Year


Mechanical dimensions



1A 1 mH choke is supplied with the bias tee. It is to be wired in series directly to the DC in solder terminal on the coax module. This is a high impedance point. Avoid using long wire, especially coax, for this connection. Do not locate the choke close to ground. Excessive stray capacitance will cause a resonance that will appear as a dip in the insertion loss between 1 and 10 MHz

Ordering information

BIAS TEE, 15 GHz, 50 V