NETWORK ANALYZERS
Combined Network/Spectrum Analysis, 10Hz to 500MHz
Model 4195A
Linear and non-linear device measurement and analysis
High accuracy and resolution
User functions
Color graphics, graphics analysis and direct copy capability
Direct save/recall with internal disc drive
The HP 4195A is a high performance, cost effective and intelligent
analyzer with combined vector network and spectrum analysis capabilities. The frequency is covered from 10Hz through 500MHz with
an excellent 0.001 Hz resolution for audio, baseband, HF, VHF and
IF applications. It directly measures amplitude ratio, phase, group
delay and spectrum level needed for characterizing linear/non-linear
analog circuits or components used in communications, telecommunications, consumer electronics and other equipment.
The HP 4195A's excellent accuracy and resolution meets the severe measurement requirements for developing advanced equipment.
A color display allows you to readily differentiate between multiple
traces. Convenient softkey operation and marker functions make deriving device parameters quick and easy. Measurement results can be
directly copied to printer or plotter without an external computer.
Furthermore, the HP 4195A has internal user functions for computing and self controlling capability. User Program, User Defined
Function and User Math allows you to quickly customize the setups
most suited to your application without using an external computer.
A built-in 3.5 inch disc drive can save the instrument state, data and
user functions.
Network analyzers and spectrum analyzers have become essential
tools for evaluating subsystems or components used in electronic
equipment. Especially, the importance of phase and group delay measurements is rapidly increasing. The HP 4195A offers full network
and spectrum analysis from 10Hz to 500MHz at half the price. It has
very wide applications. Network analysis functions include characterizing the gain/group delay ripple of filters and amplifiers. Spectrum
analysis functions include the harmonic, intermodulation distortion
of amplifiers or IF subsystems in communications and telecommunications. S-parameters can also be measured by using 2 transmission/reflection test sets, without changing direction of the device.
High Accuracy and Resolution Measurement
The HP 4195A measures amplitude ratio and phase with an accu-
racy of ±0.05dB/±0.3 deg and a resolution of 0.001 dB/0.01 deg. The
amplitude and phase distortion of transmission devices, such as filters,
amplifiers, delay lines and cables, affect the quality of information
and create bit errors in PSK or QAM systems. The HP 4195A can
evaluate distortion with high accuracy and resolution. For accuracy
enhancement, 1 Port Full Cal, 1 Port Partial Cal, Normalization and
Port Extension capabilities are available. For spectrum analysis, high
level accuracy of ±0.1 dB and fully synthesized pure local OSC, typi-
cally -100 dBc/Hz (100 Hz offset), allow you to obtain stable and
reliable C/N, harmonic distortion or intermodulation distortion mea-
surements. In addition the high shaped digital IF filter technique
makes discrimination of closely spaced signals easy, so 50/60 Hz
power-line sidebands can be measured using the `0Hz RBW.
User Functions for Easy Customized Operation
The HP 4195A has three user functions for customizing operations
for your applications without using an external computer. The User
Program gives you a one key solution for performing your applica-
tion. You can program a sequence from measurement and marker
control, computing, through printing a hard copying. This function is
very useful and improves efficiency for C/N (Carrier Noise ratio),
THD (Total Harmonic Distortion) measurements or automatic de-
vice parameter extraction, such as an amplifier's gain, group delay,
gain compression or harmonic distortion. The User Math function
helps you put the result in the form you need by using the built-in
math operators and arithmetic functions. For example, you can dis-
play level in volt peak-to-peak instead of volts rms or perform differ-
entiation of gain or max hold. The User Defined Function gives you
the power to define functions which can be called with softkeys as you
like, such as input of step size, signal tracking, transmission/reflection alternate sweep or gain/level spectrum alternate
sweep. In addition, the HP 4195A has the Program Sweep function
which can arbitrarily sweep the points programmed in the table. This
increases measurement efficiency by reducing excessive points in the
Lin or Log sweep. Also, the resolution bandwidth can be independent-
ly set for each programmed point. The above user functions and program sweep table can be saved into the built-in 3.5 inch disc, so you
can start your application at any time.
User Program for C/N Measurement
THD Measurement by Using
User Define Function
Advanced Marker Action on Color Graphics
The application oriented marker functions are very useful for both
network and spectrum measurements. You can quickly obtain the de-
sired results from the easy to see color graphics CRT. The Next Peak
is convenient for searching harmonic or spurious signals. The marker
target is used for extraction of SAW filter's 3dB bandwidth or an
amplifier's —1 dB gain compression point. The delta marker is used
for C/N measurement, and the noise marker is used for noise measurements. A maximum of four traces can be simultaneously dis-
played on the CRT, so it is easy to compare the data. The smith/polar
chart is convenient for impedance matching in circuit design. In addi-
tion, the results can be directly copied to a compatible plotter or print-
er without an external computer.
Specifications
Network Measurement
Source
Frequency: 10Hz to 500MHz, 1mHz resolution
Power: -50 dBm to +15 dBm, 0.1 dB resolution
Sweep Parameters: Frequency, power and dc bias level
Sweep Types: Linear, log, cw, program and partial
Output: 2 outputs
DC bias level: ±40V, 10mV resolution
Receiver
Frequency: 10Hz to 500MHz
Input: 4 inputs, 50 nominal
Resolution Bandwidth: 3 Hz to 300kHz, 1 or 3 step
Input Crosstalk: <-100dB
Magnitude Ratio
Dynamic Range: >100dB
Resolution: 0.001dB
Dynamic Accuracy (23 ± 5°C), -30dBm R input: ±0.05dB @
-70dBm to -30dBm T input.
Phase
Range: ±180°
Resolution: 0.01°
Dynamic Accuracy (23 ± 5°C, -30dBm input): ±0.3° @ -70
to -30dBm T input.
Delay
Range: 10ps to 500s
Resolution: 10ps @ 3.6 MHz aperture
Accuracy: depends on phase accuracy
Error Compensation
Mode: Normalization, 1 port partial cal, 1 port full cal and port
extension.
Spectrum Measurement
Frequency
Measurement Range: 10Hz to 500MHz
Resolution:
RBW: 3Hz to 300kHz, 1 or 3 step
Selectivity (60/3dB): 4.5 for 3Hz to 30Hz, 9 for 100 Hz to
10
kHz,
8.5 for 30 kHz to 300
kHz.
Noise Sideband: <-100 dBc/Hz © 1 kHz offset
<-90 dBc/Hz @ 100 Hz offset
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