MAX2605 / MAX2606 / MAX2608 / MAX2609 VCO phase noise measurement
Abstract: Maxim's IF voltage controlled oscillator (VCO) phase noise test performance. The phase noise of the VCO rolls off between 10kHz and 1MHz at 20dB / decade. All measurements are made on the Maxim evaluation board. Where VCC = + 2.75V, TA = + 25 ° C, VTUNE = 1.4V.
The MAX2605-MAX2609 are compact, high-performance intermediate-frequency (IF) voltage-controlled oscillators (VCOs) designed specifically for demanding handheld wireless communication systems. These monolithic VCOs are packaged in a miniature 6-lead SOT23, which has the advantages of low noise and low power consumption. The low-noise VCO has an on-chip integrated varactor diode and feedback capacitor, eliminating the need for external tuning components, which makes the MAX2605-MAX2609 particularly suitable for handheld system applications.
This application note describes using the Maxim evaluation board to test the phase noise performance of these devices. VCC = + 2.75V, TA = + 25 ° C, VTUNE = 1.4V. 
figure 1. 
figure 2. 
image 3. 
Figure 4.
Note that the phase noise in each figure follows the expected roll-off characteristic of 20dB / octave. This application note does not test the MAX2607, and does not provide a diagram of its phase noise characteristics. But the phase noise of the MAX2607 follows the same roll-off characteristics exhibited by all VCOs in this series.
Solder Cup Waterproof D-Sub Connector
The Solder Cups D-sub connector, also known as Solder Cups D-sub connector , typically contains a pin layout of 9 pin, 15 pin, 25 pin, 37 pin & 50 pin positions housed in increasing shell sizes accordingly. They are available in both male (plug) and female (socket) variants with the male signal contacts/pins (current rating of 5A) spaced every 2.76mm in horizontal rows and the spacing of rows vertically at 2.84mm laid out half the distance between pins of existing rows.
IP66 IP67 Rated Waterproof D-Sub Panel Mount Solder Connectors
Harsh outdoor or indoor environments can destroy electronic equipment. Standard D-sub connectors are not intended to withstand contaminants such as water and dust. These waterproof solder cup connectors are available in male or female genders and DB9, DB15, DB25, and HD15 sizes. They will accommodate wire ranges from 30 - 20 AWG. Construction features gold plated brass contacts, nickel plated steel shells, and a silicone insulating ring. Maximum recommended panel thickness is 0.078".
Antenk offer a wide range of waterproof standard density and high density male and female high density D-Sub connectors solder cup with stamped and formed Contacts in cable mount used in a variety of demanding applications.
Antenk's Solder Cup D-Sub Connectors Stamped contacts
FEATURES
Solder cup d-subs available in industry sizes/positions
Low cost economy series.
Nickel shells have indents to provide grounding and additional retention.
Low cost & high performance, non-removable stamped contacts.
Optional mounting hardware available.
Antenk's SOLDER CUP D-SUB CONNECTORS Stamped contacts
MATERIALS
Shell: Steel, Tin or Nickel Plated
Insulator: Glass-filled thermoplastic. U.L. rated 94V-O
(230°C process temp)
Stamped contacts: Male pins - Brass | Female pins - Phosphor bronze
Plating: Gold flash on entire contact (contact us for other plating options)
Solder Cup Waterproof D-Sub Connector Stamped & Formed Contact, Solder Cup Waterproof D-Sub Connector Machined Contacts, Waterproof Panel Mount Solder Cup D-Sub Connector
ShenZhen Antenk Electronics Co,Ltd , https://www.antenkwire.com