# 948XP California Instruments Oscillator Used

**Additional Features:**

-   Frequency: Four-decade resolution from 45.0 to 9999 Hz
-   Frequency accuracy: ±0.005% of programmed value
-   Temperature coefficient: ±5 ppm per °C from 25°C
-   Long-Term Stability: ±15 ppm of programmed value per year at 25°C ±5°C
-   Default (Initial Value): Any
-   External Sync: TTL input
-   Phase-Angle
-   Two-Phase: 90° separation
-   Three-Phase: 120° separation
-   Three-Phase Delta: 60° separation
-   Phase Accuracy: ±° (add 0.5 DEG per kHz above 2 kHz)
-   Remote Programming: IEEE-488 Subsets: SH1, AH1, T6, L3, SR1, RL2, DC1, DT1; IEEE-728-1982 Operating Codes and Formats; Numeric Representation: NR1, NR2, or NR3; Headers: HR1 or HR2; Message Separators: SR1
-   Bus reporting when used with IMC1
-   Voltage at Load: ±2V Accuracy with 1V resolution
-   Current Draw at Load: ±0.2 Amp accuracy with 0.1 resolution dependent on amplifier
-   Power at Load: ±0.02kw Accuracy with 0.01kw resolution dependent on amplifier
-   Power Factor of Load: 0.000 to 1.000
-   The amplitude screen provides simultaneous program of amplitude in volts RMS.
-   Precision regulation at the sense point (load) insures accuracy.
-   The range screen allows programming of the AC power source voltage range.
-   The current limit screen provides programming of maximum output current.
-   The Elapsed Time screen displays the total run time in hours.

The California Instruments 948XP is a powerful microprocessor-based programmable Power Controller with complete talker/listener capability for the IEEE-488 GPIB. All programming and control features may be accessed using either the 16-key front panel keyboard or via the IEEE-488 bus. Programming is easy, using the high-level Abbreviated Plain English (APE) language. The 16-character LCD alphanumeric display is user-friendly-the screens use the simple three-letter mnemonics that are also used for bus programming-there are no reference codes required.

Four decades of frequency output are available, with resolution to 0.1 Hz and ±0.005% accuracy. Frequency range is automatic. Local programming is simplified through the multi-page Menu Screens and seventeen parameter screens. The screens are accessed easily and quickly via the keypad.

**System Measurements**

The system output voltage, current, power, and power factor of all three phases may be monitored using the voltage (VLT), current (CUR), power (PWR) and power factor (PWF) screens respectively.

**Multi-Phase Systems**

The amplitude, frequency, and current limit of the three outputs are simultaneously programmable.

**Ramp Functions**

The amplitude, frequency, and current limit values may be programmed to increment or step over a given time. The starting and ending values, step size and step duration are all selectable. Two output parameters may be ramped simultaneously with different ramp rates.

**Calibration**

No inside adjustments are ever needed; all calibration is performed from the front-panel keypad, or via the IEEE-488 interface.

**External Sync**

An external sync input is accepted which is frequency-tracked up to 450 Hz and locks the output phase precisely to the sync input.

**Initialization Parameters**

Non-volatile memory is provided to store the IEEE-488 address, frequency limits, initial frequency, amplitude limits, initial range and calibration coefficients.

## Details

- **Price:** 0.0 USD
- **Vendor:** California Instruments
- **Type:** Oscillator
- **Tags:** California Instruments, Manufacturers, Oscillator, Other Equipment, product_manual_group_1, Product_used

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 0.00 USD | In stock |

## Images

- 948XP California Instruments Oscillator Used

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> Source: [ValueTronics](https://valuetronics.com/products/948xp-california-instruments-oscillator-used)
> Updated: 2026-05-21