Download Detailed specifications of AMP-16

Test16-mmcx preamplifier manual
Packing list
1. Preamplifier inserted inside black housing with cover, attached power cable, and 2x spring
terminals.
2. Set of RG178 cables:
a. 4x RA-MMCX to pigtail for soldering to custom probes (consumable),
b. 2x SMA to RA-MMCX 0.5m for input from the signal generator,
c. 2x RA-MMCX to BNC 1m for oscilloscope output,
d. 2x 50 Ohm RA-MMCX terminators.
3. Plastic protective box with foam.
Basic tests:
1) Connect power cable to 5VDC power supply. Acceptable voltage range is 4.7V to 6V. Preamplifier can
survive wrong power polarity (if not connected to anything except power) or voltages up to 16V (with
highly increased heat dissipation and potential overheat damage, if high voltage is applied over
extended time).
2) Verify that green LED is ON and current is 0.16A +/- 20%.
3) The most common defect is damage to the power cable crimped pins.
4) Verify cables, RA-MMCX to pigtail might be consumed for the tests (Gluing preamplifier box cover will
prevent change of the preamplifier power cable)
Instructions
1) Use tweezers to disconnect MMCX connector. Grab with tweezers the body of MMCX plug; never pull
the cable.
2) Use only high quality right angle MMCX cables, because straight MMCX cable might disintegrate
during removal.
Specs






Preamplifier is designed for use with 5V power supply. Current consumption is 160 mA (verify).
Preamplifier has 42 dB gain over BW from 35 kHz to 10 MHz -6dB at the ends if measured using
signal generator with high impedance output and oscilloscope with 50 Ohm input.
Actual application gain and BW depends on probe capacitance and second stage input
impedance (preamplifier has 50 Ohm output).
Output integral noise level is about 4 mVpp, which corresponds to 32 uVpp input noise. Actual
noise depends on the probe capacitance, cable, and EMI environment.
Errata: Connector MMCX RA J30 is blocked by LED1. It has to be replaced with straight MMCX.
Connector J1 straight is input matching output J17 straight, J2 right-angle (RA) to J18 RA, etc.
Input connectors
1,2
3,4
5,6
7,8
9,10
11,12
13,14
15,16
Output connectors
31, 32
29, 30
27, 28
25, 26
23, 24
21, 22
19, 20
17, 18
Input impedance, Ohm
510
1k
2.2k
10k
39k
100k
200k
470k
Test procedures



Use only cables RA MMCX connectors. Cables with straight MMCX connectors might be stuck
and fall apart inside the connectors.
Do not loop back preamplifier channels: preamplifier has high impedance input and 50 Ohm
output. It should not be used as the second stage amplifier.
Use ≤5mVpp signal to high impedance load or 2.5 mV signal for 50 Ohm load from generator.
For small input signals from generator. For smaller signals use attenuators, for example Fairview
Microwave SA3056-30, MMCX to MMCX -30 dB. Attenuators should be placed as close to MMCX
input connector as possible. If SMA attenuator is used, use a very short SMA to MMCX cable
after attenuator.