Description
Page 1
The PD-100i is a high speed pulse signal distribution amplifier that provides distribution
for 1 PPS signals and RF signals with a frequency range of 1 to 100 MHz.
The first module receives a 1PPS signal and supplies six buffered outputs designed to
drive low impedance loads and long 50 or 75 ohm cables. The outputs provide a 3.7
volt peak-to-peak signal into a 50 ohm load. The channel-to-channel delay differences are
less than 200ps. The distribution module has the low temperature coefficient of propaga-
tion delay that is essential for the distribution of high quality timing signals.
The second module of the instrument receives a 1-100 MHz signal and provides six buff-
ered square wave outputs. The input to this module does not have to be TTL level logic,
the input may be a sinewave or any other signal that needs to be converted to a square
wave. The typical cross-channel isolation on the RF distribution modules is 100 dB and
reverse isolation is typically greater than 110 dB. The phase noise of the modules is ex-
ceptionally low, typically –148 dBc/Hz @ Fourier frequency of 1 Hz and –170 dBc/Hz @
Fourier frequencies greater than 10 kHz. All outputs are DC coupled and conform to TTL
specifications.
The PD-100i is designed to be powered by a 100 to 240 VAC mains source or by a +12 to
+36 VDC power source if the instrument was acquired with the DC power option. The
DC power module may be used as a main power source for the instrument or in conjunc-
tion with the AC power module as a backup power supply in case of loss of the main
AC power. The instrument is designed to automatically switch from AC to DC supply
operation using a Schottky diode network and charge storage capacitors to avoid any
glitches and ensure uninterrupted continuous operation.
The requirements for the external DC power supply are +12 to +36 VDC at 2 Amperes.
The following specifications should be used to ensure the optimum performance for your
PD-100i:
DC Supply voltage +12 to +36 VDC, 2 Amps
Line regulation +/- 0.05% for a 10% line change
Load regulation +/- 0.05% for a 50% load change
Output ripple < 5mV peak-to-peak
