The 1362 UHF Oscillator (Figure 1-1) is a general-purpose oscillator for the radio-frequency laboratory. Covering the calibrated range from 220 to 920 MHz, this oscillator provides adequate power to drive bridges, slotted lines, impedance comparators, and other measuring equipment. The output is brought through an attenuator, calibrated in relative power levels, making the oscillator suitable for the testing of receivers. Direct sine-wave, square-wave, or pulse amplitude modulation is possible. Amplitude modulation free from incidental fm can be obtained with an external diode modulator. Connected to a mixer, the oscillator can be used as the local oscillator in a heterodyne receiver to convert the GR 1236 I-F Amplifier, or a low-frequency communications receiver, into a detector for uhf signals. Square-wave and pulse amplitude modulation can be obtained with the GR Type 1264 Modulating Power Supply (Figure 1-2), or leveled output can be obtained with the GR Type 1263 Amplitude-Regulating Power Supply.