Agilent Technologies 53220A Manual do Utilizador descarregar pdf (Página 3)

3

Time interval resolution

and accuracy

One of the key advances the 53200

Series provides is the industry

leading timing specifications. The

single-shot resolution for the 53230A

is 20 picoseconds while on the previ-

ous 531xxA generation, the fastest

single-shot timing available was

150 ps (53132A). Single-shot timing

represents how well the counter can

resolve an event in time. It is most

often associated with time interval

measurements, but every counter

measurement is a result of timing and

accurate placement of the edge. So,

the better the single-shot timing of a

frequency counter, the better overall

measurement performance of the

counter.

Comparison Summary

Agilent 531xxA Series

(53181A, 53131A, 53132A)

Agilent 53200 Series

(53210A, 53220A, 53230A)

Frequency bandwidth 225 MHz, 1.5 (53181A only), 3, 5, 12.4 GHz 350 MHz, 6, 15 GHz

Frequency resolution 10 digits/s (53181A, 53131A)

12 digits/s (53132A)

10 digits/s (53210A)

12 digits/s (53220A, 53230A)

Time interval resolution

(single-shot resolution)

500 ps (53131A)

150 ps (53132A)

100 ps (53220A)

20 ps (53230A)

Memory None 1M reading internal memory

USB flash

Speed Transactional: 200 readings/s

Readings to memory: N/A

Timestamp: N/A

Transactional: 350 - 400 readings/s

Readings to memory:

Frequency: up to 75,000 readings/s

Time interval: up to 90,000 readings/s

Timestamp: up to 1M readings/s

Timebase (See detailed

comparison below)

XO (standard in all models)

3 OCXO options

TCXO (standard in all models)

1 OCXO Option

Connectivity GPIB, RS232 (print only) LXI-C/LAN, USB, GPIB

Display & analysis Vacuum florescent display

Math and limit operations

Color graphical display

Full integrated math, limits, statistics,

graphs

Rack mount dimensions 212.6 mm (W) x 88.5 mm (H) x 348.3 mm (D)

(2U x ½ width)

212.8 mm (W) x 88.3 mm (H) x

272.3 mm (D) (2U x ½ width)

Memory and measurement

reading speed

There are several ways to consider

the measurement speed on frequency

counters:

• Single measurement reading

throughput: the time to take a single

measurement and transfer from vola-

tile reading memory over the I/O bus.

• Block reading throughput: the time

to take blocks of measurements into

memory and when complete, transfer

from volatile reading memory over the

I/O bus.

Typically, single measurement

throughput is slower than block

measurement throughput due to I/O

processing/transfer overhead. The

531xxA frequency counters are single

reading counters with no internal

memory. In most applications, up to

200 readings per second is the typical

single measurement reading speed

on 531xxA counters. Depending on

the I/O interface chosen (USB, LAN

or GPIB), the single measurement

throughput on the 53200 Series coun-

ters can have optimized throughput

of approximately 400 readings per

second.

The reading throughput potential is

substantially different when block

reading capabilities are considered.

With the built-in memory of 1 mil-

lion readings on the 53200 Series

counters, speeds increase to tens of

thousands of readings per second.

Again, the I/O interface chosen

impacts the amount of overhead on

the overall throughput capabilities.

The 53200 Series data sheet outlines

typical reading speeds by model (part

number 5990-6283EN).

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